Simon Willison’s Weblog

22nd March 2026

Research JavaScript Sandboxing Research — Analyzing current JavaScript sandboxing options for running untrusted code, this research compares core approaches in Node.js (including worker_threads, node:vm, and the Permission Model), prominent npm packages (isolated-vm, vm2), and alternative engines like quickjs-emscripten.

Posted 22nd March 2026 at 7:53 pm

Recent articles

Profiling Hacker News users based on their comments - 21st March 2026
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This is a beat by Simon Willison, posted on 22nd March 2026.

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